AISIN University: Bleeding and Flushing Hydraulic Power Steering Systems

If you’ve ever replaced a power steering component only to have noise or inconsistent steering return, the problem might be air trapped in the system. In this video, AISIN’s experts explain the correct way to flush and bleed a hydraulic power steering system to ensure smooth, consistent operation. You’ll learn:

• The goals of flushing and bleeding—removing old fluid and trapped air
• How fluid moves through the pump, lines, and rack—and where air can hide
• Simple techniques to prevent pump damage while bleeding the system
• Why lifting the vehicle’s front end helps remove air more effectively
• Tips for handling reservoirs with baffles and screens that trap debris

Proper bleeding and fluid replacement prevent steering noise, vibration, and premature pump failure. Follow these proven steps to restore performance and protect your customer’s steering system.